tools/lavfi-showfiltfmts.c

   1 /*
   2  * Copyright (c) 2009 Stefano Sabatini
   3  *
   4  * This file is part of FFmpeg.
   5  *
   6  * FFmpeg is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * FFmpeg is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with FFmpeg; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  19  */
  20
  21 #include "libavformat/avformat.h"
  22 #include "libavutil/pixdesc.h"
  23 #include "libavfilter/avfilter.h"
  24
  25 int main(int argc, char **argv)
  26 {
  27     AVFilter *filter;
  28     AVFilterContext *filter_ctx;
  29     const char *filter_name;
  30     const char *filter_args = NULL;
  31     int i, j;
  32
  33     av_log_set_level(AV_LOG_DEBUG);
  34
  35     if (!argv[1]) {
  36         fprintf(stderr, "Missing filter name as argument\n");
  37         return 1;
  38     }
  39
  40     filter_name = argv[1];
  41     if (argv[2])
  42         filter_args = argv[2];
  43
  44     avfilter_register_all();
  45
  46     /* get a corresponding filter and open it */
  47     if (!(filter = avfilter_get_by_name(filter_name))) {
  48         fprintf(stderr, "Unrecognized filter with name '%s'\n", filter_name);
  49         return 1;
  50     }
  51
  52     if (!(filter_ctx = avfilter_open(filter, NULL))) {
  53         fprintf(stderr, "Inpossible to open filter with name '%s'\n", filter_name);
  54         return 1;
  55     }
  56     if (avfilter_init_filter(filter_ctx, filter_args, NULL) < 0) {
  57         fprintf(stderr, "Impossible to init filter '%s' with arguments '%s'\n", filter_name, filter_args);
  58         return 1;
  59     }
  60
  61     /* create a link for each of the input pads */
  62     for (i = 0; i < filter_ctx->input_count; i++) {
  63         AVFilterLink *link = av_malloc(sizeof(AVFilterLink));
  64         filter_ctx->inputs[i] = link;
  65     }
  66     for (i = 0; i < filter_ctx->output_count; i++) {
  67         AVFilterLink *link = av_malloc(sizeof(AVFilterLink));
  68         filter_ctx->outputs[i] = link;
  69     }
  70
  71     if (filter->query_formats)
  72         filter->query_formats(filter_ctx);
  73     else
  74         avfilter_default_query_formats(filter_ctx);
  75
  76     /* print the supported formats in input */
  77     for (i = 0; i < filter_ctx->input_count; i++) {
  78         AVFilterFormats *fmts = filter_ctx->inputs[i]->out_formats;
  79         for (j = 0; j < fmts->format_count; j++)
  80             printf("INPUT[%d] %s: %s\n",
  81                    i, filter_ctx->filter->inputs[i].name,
  82                    av_pix_fmt_descriptors[fmts->formats[j]].name);
  83     }
  84
  85     /* print the supported formats in output */
  86     for (i = 0; i < filter_ctx->output_count; i++) {
  87         AVFilterFormats *fmts = filter_ctx->outputs[i]->in_formats;
  88         for (j = 0; j < fmts->format_count; j++)
  89             printf("OUTPUT[%d] %s: %s\n",
  90                    i, filter_ctx->filter->outputs[i].name,
  91                    av_pix_fmt_descriptors[fmts->formats[j]].name);
  92     }
  93
  94     fflush(stdout);
  95     return 0;
  96 }